diff --git a/pkgs/applications/editors/emacs/default.nix b/pkgs/applications/editors/emacs/default.nix
index 295579c7c085..2c7253ffb7b7 100644
--- a/pkgs/applications/editors/emacs/default.nix
+++ b/pkgs/applications/editors/emacs/default.nix
@@ -13,10 +13,24 @@ lib.makeScope pkgs.newScope (
       inherit lib;
       inherit (pkgs)
         fetchFromGitHub
-        fetchzip
+        fetchgit
         ;
     };
 
+    emacs31 = callPackage (self.sources.emacs31) inheritedArgs;
+
+    emacs31-gtk3 = self.emacs31.override {
+      withGTK3 = true;
+    };
+
+    emacs31-nox = self.emacs31.override {
+      noGui = true;
+    };
+
+    emacs31-pgtk = self.emacs31.override {
+      withPgtk = true;
+    };
+
     emacs30 = callPackage (self.sources.emacs30) inheritedArgs;
 
     emacs30-gtk3 = self.emacs30.override {
@@ -31,11 +45,6 @@ lib.makeScope pkgs.newScope (
       withPgtk = true;
     };
 
-    emacs30-macport = callPackage (self.sources.emacs30-macport) (
-      inheritedArgs
-      // {
-        srcRepo = true;
-      }
-    );
+    emacs30-macport = callPackage (self.sources.emacs30-macport) inheritedArgs;
   }
 )
diff --git a/pkgs/applications/editors/emacs/make-emacs.nix b/pkgs/applications/editors/emacs/make-emacs.nix
index 8a39e96f900e..22246f9fe962 100644
--- a/pkgs/applications/editors/emacs/make-emacs.nix
+++ b/pkgs/applications/editors/emacs/make-emacs.nix
@@ -29,7 +29,6 @@
   gtk3-x11,
   harfbuzz,
   imagemagick,
-  jansson,
   libxaw,
   libxcursor,
   libxft,
@@ -66,7 +65,7 @@
   # Boolean flags
   withNativeCompilation ? stdenv.buildPlatform.canExecute stdenv.hostPlatform,
   noGui ? false,
-  srcRepo ? false,
+  srcRepo ? true,
   withAcl ? false,
   withAlsaLib ? false,
   withAthena ? false,
@@ -80,8 +79,6 @@
   withGpm ? stdenv.hostPlatform.isLinux,
   # https://github.com/emacs-mirror/emacs/blob/emacs-27.2/etc/NEWS#L118-L120
   withImageMagick ? false,
-  # Emacs 30+ has native JSON support
-  withJansson ? lib.versionOlder version "30",
   withMailutils ? true,
   withMotif ? false,
   withNS ? stdenv.hostPlatform.isDarwin && !(variant == "macport" || noGui),
@@ -256,9 +253,6 @@ stdenv.mkDerivation (finalAttrs: {
     gnutls
     (lib.getDev harfbuzz)
   ]
-  ++ lib.optionals withJansson [
-    jansson
-  ]
   ++ [
     libxml2
     ncurses
diff --git a/pkgs/applications/editors/emacs/sources.nix b/pkgs/applications/editors/emacs/sources.nix
index fb9d9697cd85..e173831d0903 100644
--- a/pkgs/applications/editors/emacs/sources.nix
+++ b/pkgs/applications/editors/emacs/sources.nix
@@ -1,7 +1,7 @@
 {
   lib,
   fetchFromGitHub,
-  fetchzip,
+  fetchgit,
 }:
 
 let
@@ -26,9 +26,9 @@ let
       src =
         {
           "mainline" = (
-            fetchzip {
-              url = "mirror://gnu/emacs/${rev}.tar.xz";
-              inherit hash;
+            fetchgit {
+              url = "https://https.git.savannah.gnu.org/git/emacs.git";
+              inherit rev hash;
             }
           );
           "macport" = (
@@ -74,7 +74,7 @@ let
         '';
         changelog =
           {
-            "mainline" = "https://www.gnu.org/savannah-checkouts/gnu/emacs/news/NEWS.${version}";
+            "mainline" = "https://cgit.git.savannah.gnu.org/cgit/emacs.git/plain/etc/NEWS?h=${rev}";
             "macport" = "https://github.com/jdtsmith/emacs-mac/blob/${rev}/NEWS-mac";
           }
           .${variant};
@@ -105,6 +105,14 @@ let
     };
 in
 {
+  emacs31 = import ./make-emacs.nix (mkArgs {
+    pname = "emacs";
+    version = "31.0.90";
+    variant = "mainline";
+    rev = "emacs-31.0.90";
+    hash = "sha256-Rzlnn+NKQ+jICXLNop27RnVInq79myn4hueJieDO2Ck=";
+  });
+
   emacs30 = import ./make-emacs.nix (mkArgs {
     pname = "emacs";
     version = "30.2";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b4c2070d4c75..a880fea0db60 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8924,6 +8924,11 @@ with pkgs;
   electrum-ltc = libsForQt5.callPackage ../applications/misc/electrum/ltc.nix { };
 
   inherit (recurseIntoAttrs (callPackage ../applications/editors/emacs { }))
+    emacs31
+    emacs31-gtk3
+    emacs31-nox
+    emacs31-pgtk
+
     emacs30
     emacs30-gtk3
     emacs30-nox